\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Average marginal effect of linear time trend, by subgroup}
\begin{tabular}{l*{3}{c}}
\hline\hline
            &          US         &          UK         &     Germany         \\
            &                     &                     &                     \\
\hline
Males       &    -0.00071\sym{**} &    -0.00238         &     0.00096\sym{***}\\
            &   (0.00023)         &   (0.00234)         &   (0.00019)         \\
[1em]
Females     &    -0.00104\sym{***}&    -0.00207         &     0.00143\sym{***}\\
            &   (0.00023)         &   (0.00193)         &   (0.00021)         \\
[1em]
Tertiary degree&    -0.00068\sym{**} &    -0.00226         &    -0.00026         \\
            &   (0.00022)         &   (0.00230)         &   (0.00024)         \\
[1em]
No tertiary degree&    -0.00076\sym{***}&    -0.00221         &     0.00194\sym{***}\\
            &   (0.00021)         &   (0.00200)         &   (0.00017)         \\
[1em]
Part-time workers&    -0.00131\sym{**} &    -0.00192         &     0.00218\sym{***}\\
            &   (0.00046)         &   (0.00238)         &   (0.00036)         \\
[1em]
Full-time workers&    -0.00079\sym{***}&    -0.00234         &     0.00104\sym{***}\\
            &   (0.00017)         &   (0.00190)         &   (0.00015)         \\
[1em]
Self-employed workers&     0.00049         &    -0.00265         &     0.00103         \\
            &   (0.00037)         &   (0.00758)         &   (0.00058)         \\
[1em]
Non-self-employed workers&    -0.00109\sym{***}&    -0.00220         &     0.00119\sym{***}\\
            &   (0.00018)         &   (0.00154)         &   (0.00015)         \\
[1em]
White workers&    -0.00096\sym{***}&    -0.00224         &                     \\
            &   (0.00017)         &   (0.00157)         &                     \\
[1em]
Non-white workers&    -0.00158\sym{***}&    -0.00214         &                     \\
            &   (0.00046)         &   (0.00561)         &                     \\
[1em]
Union members&    -0.00200\sym{***}&    -0.00235         &                     \\
            &   (0.00050)         &   (0.00292)         &                     \\
[1em]
Non-union members&    -0.00064\sym{***}&    -0.00218         &                     \\
            &   (0.00017)         &   (0.00175)         &                     \\
[1em]
Immigrants  &     0.00021         &    -0.00236         &     0.00081         \\
            &   (0.00070)         &   (0.01098)         &   (0.00043)         \\
[1em]
Natives     &    -0.00112\sym{***}&    -0.00223         &     0.00108\sym{***}\\
            &   (0.00017)         &   (0.00157)         &   (0.00015)         \\
[1em]
New starters&                     &    -0.00244         &                     \\
            &                     &   (0.00503)         &                     \\
[1em]
Non-new starters&                     &    -0.00220         &                     \\
            &                     &   (0.00159)         &                     \\
[1em]
Temporary workers&                     &    -0.00341         &    -0.00113\sym{*}  \\
            &                     &   (0.00885)         &   (0.00044)         \\
[1em]
Permanent workers&                     &    -0.00206         &     0.00161\sym{***}\\
            &                     &   (0.00149)         &   (0.00015)         \\
\hline
N           &       20287         &      192029         &      303248         \\
\hline\hline
\multicolumn{4}{l}{\footnotesize This table displays the average marginal effect of the linear time trend on the}\\
\multicolumn{4}{l}{\footnotesize probability of feeling insecure in a logistic regression.}\\
\multicolumn{4}{l}{\footnotesize Standard errors in parentheses.}\\
\multicolumn{4}{l}{\footnotesize * p < 0.05, ** p < 0.01, *** p < 0.001}\\
\end{tabular}
\end{table}
